错误码2-SendRequest调用失败，catch到的

转自 https://blog.csdn.net/heque/article/details/88540462

解决方法：
打开internet explorer（或者internet explorer64）， 选择“文件”下拉菜单（没看到的话，按ALT键可以显示菜单栏），然后取消选中“脱机工作”，返回“联机”工作。之后，使用wininet的相关编程将正常工作；SendRequest的返回将正常。

另外，internet explorer的脱机工作，还会导致vpn工具的登录失败问题，导致vpn的服务端网络等问题

 

这个是

分析：

1.通过firefox或360浏览器访问该https链接能够正常登录，说明网络和服务器等都没有问题；

2.将代码拷贝到另外一台电脑上运行，执行httpsendrequest没有报错，说明应该是系统存在问题；

经过查找分析后，终于解决；

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int CHttpClient::ExecuteRequest(LPCTSTR strMethod, LPCTSTR strUrl, LPCTSTR strPostData, string &strResponse) {     CString strServer;     CString strObject;     DWORD dwServiceType;     INTERNET_PORT nPort;     strResponse = "";        AfxParseURL(strUrl, dwServiceType, strServer, strObject, nPort);        if(AFX_INET_SERVICE_HTTP != dwServiceType && AFX_INET_SERVICE_HTTPS != dwServiceType)     {         return FAILURE;     }           //DWORD dwOpenRequestFlags = INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTP |  //       INTERNET_FLAG_KEEP_CONNECTION |  //       INTERNET_FLAG_NO_AUTH |  //       INTERNET_FLAG_NO_COOKIES |  //       INTERNET_FLAG_NO_UI |  //       //设置启用HTTPS  //       INTERNET_FLAG_SECURE |  //       INTERNET_FLAG_RELOAD;           //m_pSession->SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, 1000 * 30);     //m_pSession->SetOption(INTERNET_OPTION_CONNECT_BACKOFF,1000);     //m_pSession->SetOption(INTERNET_OPTION_CONNECT_RETRIES,1);     try     {         m_pConnection = m_pSession->GetHttpConnection(strServer,             dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_CONNECT : SECURE_CONNECT,             nPort);                    m_pFile = m_pConnection->OpenRequest(strMethod, strObject,             NULL, 1, NULL, NULL,             (dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_REQUEST : SECURE_REQUEST));                       //m_pFile = m_pConnection->OpenRequest(strMethod, strObject,     //        NULL, 1, NULL, NULL,     //        dwOpenRequestFlags);    #if 0         DWORD dwFlags;         m_pFile->QueryOption(INTERNET_OPTION_SECURITY_FLAGS, dwFlags);         dwFlags |= SECURITY_FLAG_IGNORE_UNKNOWN_CA;         set web server option         m_pFile->SetOption(INTERNET_OPTION_SECURITY_FLAGS, dwFlags); #endif            m_pFile->AddRequestHeaders("Host: sms.huhutv.com.cn");         m_pFile->AddRequestHeaders("Accept: text/html, */*; q=0.01");         m_pFile->AddRequestHeaders("User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36");         m_pFile->AddRequestHeaders("Referer: https://sms.huhutv.com.cn/rtcrm-clientweb/npage/obim/staff/loginmng/initLogin.do");         m_pFile->AddRequestHeaders("Accept-Language: zh-CN,zh;q=0.8");         m_pFile->AddRequestHeaders("Content-Type: application/x-www-form-urlencoded;charset=UTF-8");         m_pFile->AddRequestHeaders("Accept-Encoding: gzip, deflate, sdch");         if(strCookie != ""){             CString str;             str.Format("Cookie:%s",strCookie);             m_pFile->AddRequestHeaders(str);         }else         {             m_pFile->AddRequestHeaders("Cookie: JSESSIONID=6F5AA3FA40C60178D776152742886227; insert_cookie=49078854");         }         m_pFile->AddRequestHeaders("Connection: keep-alive");         //MessageBox(NULL,strCookie.GetString(), "strCookie", MB_OK|MB_ICONINFORMATION);         //ShowFileHeaders();         m_pFile->SendRequest(NULL, 0, (LPVOID)(LPCTSTR)strPostData, strPostData == NULL ? 0 : _tcslen(strPostData));            char szChars[BUFFER_SIZE + 1] = {0};         string strRawResponse = "";         UINT nReaded = 0;         GetURLCookie();                   DWORD dwStatus = 0;         DWORD dwStatusLen = sizeof(dwStatus);          m_pFile->QueryInfo(HTTP_QUERY_FLAG_NUMBER | HTTP_QUERY_STATUS_CODE,                      &dwStatus, &dwStatusLen, 0);            while ((nReaded = m_pFile->Read((void*)szChars, BUFFER_SIZE)) > 0)         {             szChars[nReaded] = '\0';             strRawResponse += szChars;             memset(szChars, 0, BUFFER_SIZE + 1);         }                   int unicodeLen = MultiByteToWideChar(CP_UTF8, 0, strRawResponse.c_str(), -1, NULL, 0);         WCHAR *pUnicode = new WCHAR[unicodeLen + 1];         memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));            MultiByteToWideChar(CP_UTF8,0,strRawResponse.c_str(),-1, pUnicode,unicodeLen);         CString cs(pUnicode);         delete []pUnicode;         pUnicode = NULL;            strResponse = cs;            //Clear();     }     catch (CInternetException* e)     {         //Clear();         DWORD dwErrorCode = e->m_dwError;         e->Delete();            DWORD dwError = GetLastError();         CString strErr;         strErr.Format("dwErrorCode = %d", dwErrorCode);         //LOG::out0("dwError = %d", dwError, 0);         MessageBox(NULL,strErr.GetString(), "提示", MB_OK|MB_ICONINFORMATION);         if (ERROR_INTERNET_TIMEOUT == dwErrorCode)         {             return OUTTIME;         }         else         {             return FAILURE;         }     }     return SUCCESS; }